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1 .This is Scientific American's 60-Second Science. I'm Allie Wilkinson. Got a minute?
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2 .Our homes glow at night.
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3 .Lightbulbs, TVs, and now computers, e-readers, tablets and smartphones expose people to an increasing amount of light after dark.
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4 .And the color of that light may influence mood and brain function.
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5 .That's according to a study in the Journal of Neuroscience.
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6 .Researchers looked at the role of specialized photosensitive cells in the retina.
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7 .The cells, called ipRGCs, are responsible for regulating circadian rhythms.
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8 .And recent evidence suggests these cells may also play a role in mood and cognition.
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9 .To test how nocturnal lighting color affects mood, the researchers exposed hamsters to nighttime conditions of no light, red light, white light or blue light for four weeks each.
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10 .Hamsters exposed to red light at night had the fewest brain changes associated with depression in humans,
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11 .while blue and white light had the worst effects on mood.
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12 .So late-night work e-mail may not be the only thing ticking you off,
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13 .the blue glow of your machine may also be getting you down.
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14 .The best bet: shut down and get some shut-eye.
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15 .Thanks for the minute, for Scientific American's 60-Second Science. I'm Allie Wilkinson.
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